Half Live Weapons by Kom.
A game for the Megazeux interpreter.
To play this game, you need the interpreter:
http://os4depot.net/share/game/megazeux/megazeux.lha
To install it, copy Half_Life_Weapons/ to Megazeux:games/
Then run the interpreter and select the game.
About the game:

Copyright (c) 2004-2016 by Björn Hagström All Rights Reserved Amiga OS and its logos are registered trademarks of Hyperion Entertainment